title: Sleep and circadian rhythms in mammalian torpor.
mesh_terms: D000818:Animals; D001143:Arousal / Q000502:physiology; D005075:Biological Evolution; D002940:Circadian Rhythm; D006605:Hibernation / Q000502:physiology*; D006706:Homeostasis; D006801:Humans; D012890:Sleep / Q000502:physiology*; D013493:Suprachiasmatic Nucleus / Q000502:physiology